Doug wrote:
I personally have not seen any GPS approaches that use the glideslope
feature of the 480, but I may have been missing something. I agree,
that a glideslpe for a non-precision approach is a great idea and if
the 480 can do it, then that is the one to have (for a price no doubt).

I fly them all the time. I must admit that I don't understand all the
nuances of exactly which approaches have it (i.e. even some that don't
have VNAV minima published on the plate), but the bottom line is a
message pops up on the GNS-480 display saying, "LNAV/VNAV", and the
glide slope needle comes alive. From there on, just keep the needles
in the donut, just like on an ILS.

Installed price is about $10k.